local t = {a = 15}
local mt = {
    -- __index = function (table, key)
    --     return 12333
    -- end
__newindex = {}
}

setmetatable(t,{__newindex = mt})

t["12313123123"] = "12asdsadasdsa"
setmetatable(t,{__index = mt})
print(t["12313123123"])